Section 4.3

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61. True. All the cosine values
are on the left side of the unit
circle which means it is obtuse.
correct
62. False. The answer is -0.8.
Answer is TRUE ... sine of theta value is the y-coordinate
divided by the hypotenuse ... negative six / ten
63. E. Theta is .411...and the sin of -theta is -.4
and the csc of theta is 2.5, and
those two added together are 2.1.
correct
64. B. That's what they equal.
correct ... moving 180 degrees on the circle causes the cosine
value to change sign.
65. A. The graph i a straight line at x=1.
correct ... this will be our first identity after midterms
66. In process.
for those who care the answer is A ... we will cover this material after
midterms.